Swage Pipe Fittings Completely Electro Plated Manufactured From Carbon Steel With Bsp Iso R7 Threads *Machined By Cnc Lathe Creating A Leak Tight Connection Meets International Lead Free Requirements *The Entire Fitting; Including Threads Are Electro Plated At 8 12 Um For Corrosion Protection *All Sizes Above 25mm Internally Scarfed Creating A Smooth Internal Bore.